davidmanheim
estimated 5% and said “There are many vested interests in bitcoin infrastructure that would be damaged by the currency being rendered more useful for truely anonymous illegal transactions.”
on 2015-03-29

Andrew MacFie
said “not likely to be incorporated into BTC, more likely to be its own currency”
on 2016-01-02

davidmanheim
estimated 4% and said “(Notice Zooko’s launch of Zerocash.)”
on 2016-01-28

equivrel
estimated 15% and said “I take this to mean the bulk of the technology in ZC is actually incorporated into Bitcoin. If this means bitcoin may have some feature inspired by independent zerocoin development, then much higer. ”
on 2016-02-14

gwern
said “nowhere close to being added. in 2013 I was a little worried about inertia but in retrospect, I didn’t expect it to be anywhere near as bad as it has been in the 5 years since…”
on 2018-11-23